LTM4682 datasheet(7/130 Pages) AD

7 / 130 page

LTM4682

Rev. A

For more information www.analog.com

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range (Note 2). Specified as each individual output channel (Note 4). TA = 25°C, VIN = 12V, RUNn = 3.3V,

RUNP = 12V, FREQUENCY_SWITCH = 575kHz and VOUTn commanded to 0.75V unless otherwise noted. Configured with factory-default

EEPROM settings and per Test Circuit 1, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Analog OV/UV SVIN_nn Input Voltage Supervisor Comparators (Threshold Detectors for VIN_ON and VIN_OFF)

NSVIN-OV/UV-COMP SVIN_nn OV/UV Comparator

Threshold-Programming Resolution

(Note 14)

Bits

SVIN-OU-RANGE

SVIN_nn OV/UV Comparator

Threshold-Programming Range

Limited to Abs Max = 18V

4.5

SVIN-OU-STP

SVIN_nn OV/UV Comparator Threshold-

Programming LSB Step Size

(Note 14)

SVIN-OU-ACC

SVIN_nn OV/UV Comparator

Threshold Accuracy

9V < SVIN ≤ 16V

4.5V ≤ SVIN ≤ 9V

±3

±270

tPROP-SVIN-HIGH-VIN SVIN_nn OV/UV Comparator

Response Time, High VIN Operating

Configuration

Test Circuit 1, and:

VIN_ON = 9V, SVIN Driven from 8.775V to 9.225V

VIN_OFF = 9V, SVIN Driven from 9.225V to 8.775V

100

µs

tPROP-SVIN-LOW-VIN SVIN_nn OV/UV Comparator

Response Time, Low VIN Operating

Configuration

Test Circuit 2, and:

VIN_ON = 4.5V, SVIN Driven from 4.225V to 4.725V

VIN_OFF = 4.5V, SVIN Driven from 4.725V to 4.225V

100

µs

Channeln Output Voltage Readback (READ_VOUTn)

NVO-RB

Output Voltage Readback Resolution

and LSB Step Size

(Note 14)

244

Bits

µV

VO-F/S

Output Voltage Full-Scale

Digitizable Range

VRUNn = 0V (Note 14), Limited to 1.35V Max Operating

VO-RB-ACC

Output Voltage Readback Accuracy

Channel n: 0.7V ≤ VVOSNS+ – VVOSNS– < 1.35V

–7

tCONVERT-VO-RB

Output Voltage Readback

Update Rate

MFR_ADC_CONTROL = 0x00 (Notes 9, 14)

MFR_ADC_CONTROL = 0x01 through 0x0C (Notes 9, 14)

MFR_ADC_CONTROL Section

Input Voltage (SVIN_nn ) Readback (READ_VIN)

NSVIN-RB

Input Voltage Readback Resolution

and LSB Step Size

(Notes 10, 14) Limited to Abs Max = 18V

15.625

Bits

SVIN-F/S

Input Voltage Full-Scale

Digitizable Range

(Notes 11, 14) Limited to 16V Operating

SVIN-RB-ACC

Input Voltage Readback Accuracy

READ_VIN, 4.5V ≤ SVIN ≤ 16V

Within ±2% of Reading

tCONVERT-SVIN-RB Input Voltage Readback Update Rate MFR_ADC_CONTROL = 0x00 (Notes 9, 14)

MFR_ADC_CONTROL = 0x01 (Notes 9, 14)

Channeln OutputCurrent(READ_IOUTn),DutyCycle(READ_DUTY_CYCLEn),andComputedInputCurrent(MFR_READ_IINn)Readback

NIO-RB

Output Current Readback Resolution

and LSB Step Size

(Notes 10, 14)

34.1

Bits

IOUT-F/S

Output Current Full-Scale

Digitizable Range

(Note 14) Utilizing MFR_PWM_MODE[7] = 1, Using

IOUT_OC_FAULT_LIMIT = 61A, See the IOUT_OC_

FAULT_LIMIT in the PMBus Command Details Section

IOUT-RB-ACC

Output Current, Readback Accuracy

READ_IOUTn, Channel 0 to Channel 3, 0 ≤ IOUTn ≤ 25A,

Forced Continuous Mode, MFR_PWM_MODEn[0] = 1b

See Histograms in Typical Performance Characteristics

Section, (Note 12)

Within 1.5A of Reading

IOUT-RB(31.25A)

Full Load Output Current Readback

(Note 12), See Histograms in Typical Performance

Characteristics

31.25

tCONVERT-IO-RB

Output Current Readback Update

Rate

MFR_ADC_CONTROL = 0x00 (Notes 9, 14)

MFR_ADC_CONTROL = 0x06 (CH0,2 IOUT) or 0x0A (CH1,3 IOUT)

(Notes 9, 14) See MFR_ADC_CONTROL SECTION

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